MailGoThai-ZimbraAPI Prerequisite Software Virsual Machine(In case of simulation) Zimbra Mail Server 8.6 or higher Java 1.7 or 1.8 Eclipse Installation Install Zimbra Mail Server on CentOS Install Certificate Windows Linux ./install_cacerts.sh Utility Generate PreAuth key Reference https://confluence.atlassian.com/kb/unable-to-connect-to-ssl-services-due-to-pkix-path-building-failed-779355358.html